Optimising two-stage independent culling selection in tree and animal breeding

P P Cotterill; J W James

doi:10.1007/BF00285891

Optimising two-stage independent culling selection in tree and animal breeding

Theor Appl Genet. 1981 Mar;59(2):67-72. doi: 10.1007/BF00285891.

Authors

P P Cotterill¹, J W James

Affiliation

¹ School of Wool and Pastoral Sciences, University of New South Wales, Kensington, N.S.W., Australia.

PMID: 24276382
DOI: 10.1007/BF00285891

Abstract

Theory is given for a simple practical method of predicting gain from two-stage independent culling, where stage 1 of selection is for individual performance and stage 2 is for either progeny performance only, or an index combining individual and progeny performance. Expected gain is determined as a direct function of heritabilities, genetic correlations, selection intensities and progeny-testing capacity. Results show the effect these parameters can have on proportions selected at each stage and, if multiple selection criteria are used, traits selected for first. Methods are discussed in the context of tree and animal breeding, with an example taken from forestry.